Re: Data loss after update for engine wiredtiger

From: Asya Kamsky <asya@xxxxxxxxxxx>
To: mongodb-user <mongodb-user@xxxxxxxxxxxxxxxx>
Date: Mon, 9 May 2016 12:46:35 -0700
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Please note that "count" command in WiredTiger may not match the count of
documents in the collection under some circumstances.   Have you tried
checking with db.collection.find().itcount() - which actually counts the
documents rather than using the short-cut count() based on metadata?

Asya


On Mon, May 9, 2016 at 7:47 AM, Frederico Ferreira <
frederico.dida1@xxxxxxxxx> wrote:

After upgrading the mongo to the engine WT saw that had differences in the total
number of objects after update to the new storage engine wired Tiger in
mongo 3.0, someone had this probelma? it's normal? Realemente hear loss of data
with the exchange of the engine, because apparently this standard system.

Note: it was done mungodump and mongorestore base

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Asya Kamsky
Lead Product Manager
MongoDB
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